12:15 does not belong, since that is a ratio of 4:5, whilst the others are all 3:4.
Answer:
length times width for area so its 5x6=30
Answer:
6
Step-by-step explanation:
The circumference of a circle is 
, so
. We can use this because the area of a circle is
. Thus,
.
So you basically add the amount it grew each week. So week one is 2 and 1/2, week two is 2 and 3/4 and week three is 3 and 1/4. to make things simpler, add week two and three which gets you 6inches, then add week one, to get 8 and a half inches.
A is correct. Hope my answer helped u :)